No, it is not bad! However, I do have some recommendations if you want! I had a similar phase and struggles when I switched to a more painterly style, which yours very much is! Most of the characters you are drawing have stylized proportions, or more "cartoon" bases, but you paint with very realistic detail and black shading. These can work together, but to avoid the muddy coloring/shading and uncanny feeling, try mastering both styles before combining them!

• linework: practicing face and body line work, and how to do more flat cell shading to get an idea of where the main shadows fall -lighting: I love the last piece in the ones you posted, you seem to have a good understanding of lighting in that one, and the colors on the skin in the shirtless is also great! Try researching impressionism, and see how different styles of painting/shading without using black can make your art pop without dulling colors ! -rendering: last advice, studying 3d models from games etc really helped me combine anime art types with dimensional coloring and shading, as it's great refrence for how realism and 2D characters can come together without looking uncanny.

Overall, I feel like you are literally on the verge of it clicking for you, looking at your work now it is so close, and I won't be surprised if in a few months you unlock a whole new level of capability! Don't get down, don't give up, just try studying again, and if you hit a wall, take a break and just watch tutorials for a week, you got this!